For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningInstallation Procedure
Install the following components on the drivetrain and front suspension
frame:
CH 49460-1 adapter (2).
CH 49460-2 adapter (4).
CH 6615-10 hydraulic cylinder (1).
NEW frame insulator (3)
Note: Check marking of frame insulator.
Press carefully the frame insulator in to the ...
Engine Air Cleaner/Filter
When to Inspect the Engine Air Cleaner/Filter
Inspect the air cleaner/filter at the scheduled maintenance intervals and replace
it at the first oil change after each 80 000 km (50,000 mi) interval. If you are
driving in dusty/dirty conditions, inspect the filter at each engine oil change.
How ...
Power Door Locks Description and Operation
Door Lock System Components
The power door lock system consists of the following components:
Door lock switch - located in the center of the instrument panel
Body control module (BCM)
Driver door latch
Passenger door latch
Left rear door latch
Right rear door latch
Door Lock System ...